Head-mounted display device



FIG. 1 is a top right front perspective view of a head-mounted display device showing our new design;

FIG. 2 is a bottom left rear perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The dashed broken lines represent unclaimed portions of the head-mounted display device and form no part of the claimed design. 

CLAIM The ornamental design for a head-mounted display device, as shown and described. 